C09K 8/887
Containing cross-linking agents
Official title: {containing cross-linking agents}
C09K8/887 (Containing cross-linking agents) appears on 548 US grants and 548 published applications in this corpus.
Search patents in C09K- Granted patents
- 548
- Published applications
- 548
- Assignees
- 170
- Inventors
- 886
- Latest grant
- 26 May 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1977 | 1 | 0 |
| 1978 | 2 | 0 |
| 1979 | 3 | 0 |
| 1980 | 0 | 0 |
| 1981 | 2 | 0 |
| 1982 | 3 | 0 |
| 1983 | 0 | 0 |
| 1984 | 3 | 0 |
| 1985 | 5 | 0 |
| 1986 | 8 | 0 |
| 1987 | 10 | 0 |
| 1988 | 13 | 0 |
| 1989 | 10 | 0 |
| 1990 | 8 | 0 |
| 1991 | 13 | 0 |
| 1992 | 16 | 0 |
| 1993 | 15 | 0 |
| 1994 | 9 | 0 |
| 1995 | 3 | 0 |
| 1996 | 5 | 0 |
| 1997 | 5 | 0 |
| 1998 | 10 | 0 |
| 1999 | 5 | 0 |
| 2000 | 4 | 0 |
| 2001 | 4 | 0 |
| 2002 | 3 | 2 |
| 2003 | 2 | 5 |
| 2004 | 4 | 8 |
| 2005 | 0 | 11 |
| 2006 | 10 | 20 |
| 2007 | 8 | 10 |
| 2008 | 6 | 9 |
| 2009 | 4 | 14 |
| 2010 | 9 | 22 |
| 2011 | 10 | 14 |
| 2012 | 10 | 22 |
| 2013 | 12 | 13 |
| 2014 | 13 | 37 |
| 2015 | 17 | 46 |
| 2016 | 19 | 71 |
| 2017 | 39 | 57 |
| 2018 | 40 | 50 |
| 2019 | 50 | 41 |
| 2020 | 41 | 29 |
| 2021 | 24 | 22 |
| 2022 | 24 | 17 |
| 2023 | 26 | 8 |
| 2024 | 6 | 6 |
| 2025 | 9 | 11 |
| 2026 | 5 | 3 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Low concentration synthetic polymer fracturing fluid with ascorbic acid26 May 2026US 12,637,610 B2Beijing Huamei, Inc.
- In-situ composite polymeric structures for far-field diversion during hydraulic fracturing21 Apr 2026US 12,606,736 B2Schlumberger Technology Corporation
- Methods and compositions for thermally shocking subsurface formations10 Mar 2026US 12,571,291 B1King Fahd University of Petroleum and Minerals
- Method and compositions for stimulating subterranean formations10 Feb 2026US 12,545,831 B2King Fahd University of Petroleum and Minerals
- Compositions for enhancing viscosity of subterranean fluids utilizing chelating agents3 Feb 2026US 12,540,271 B2King Fahd University of Petroleum and Minerals
- Methods and compositions for thermally shocking subsurface formations9 Jul 2026US 2026/0193970 A1King Fahd University of Petroleum and Minerals
- Compositions for in situ fluid gelation for far-field fracture control19 Mar 2026US 2026/0078298 A1Chevron U.S.A.Inc.
- Temporary Isolation System for Reservoirs15 Jan 2026US 2026/0015920 A1Baker Hughes Oilfield Operations LLC
- Method and compositions for stimulating subterranean formations11 Dec 2025US 2025/0376617 A1King Fahd University of Petroleum and Minerals
- Compositions for enhancing viscosity of subterranean fluids utilizing chelating agents11 Dec 2025US 2025/0376618 A1King Fahd University of Petroleum and Minerals
Most cited
By later US patents
- Subterranean formation treating fluid concentrates, treating fluids and methods250US 6,488,091 B1Halliburton Energy Services.Inc. · 2002
- Fracturing using gel with ester delayed breaking159US 6,793,018 B2BJ Services Company · 2004
- In situ reversible crosslinked polymer gel used in hydrocarbon recovery applications154US 5,082,056 AMarathon Oil Company · 1992
- Method and compositions for reducing the permeabilities of subterranean zones154US 6,196,317 B1Halliburton Energy Services.Inc. · 2001
- High temperature, low residue well treating fluids and methods153US 6,214,773 B1Halliburton Energy Services.Inc. · 2001